High-sensitivity capacitive flexible tactile sensor based on three-dimensional porous microstructure composite dielectric layer and manufacturing method thereof

Abstract

The invention discloses a high-sensitivity capacitive flexible tactile sensor based on a three-dimensional porous microstructure composite dielectric layer and a manufacturing method thereof. The upper and lower surfaces of a three-dimensional porous microstructure composite dielectric layer are orderly provided with flexible isolation layers, flexible plates and flexible protection layers. According to the three-dimensional porous microstructure composite dielectric layer, a graphene / multi-wall carbon nanotube / silicone rubber conductive composite material is used as a force sensitive composite material, and dipping and coating the graphene / multi-wall carbon nanotube / silicone rubber conductive composite material at a polyurethane sponge three-dimensional framework surface layer, the three-dimensional porous microstructure composite dielectric layer is obtained through self-assembly. The capacitive flexible tactile sensor of the invention has good flexibility, detection sensitivity anddynamic response characteristics, and a design idea is provided for the design of the highly-sensitivity flexible tactile sensor for an electronic skin application of an intelligent robot.

Description

technical field [0001] The invention belongs to the field of flexible tactile sensors, in particular to a high-sensitivity capacitive flexible tactile sensor based on a three-dimensional porous microstructure composite medium layer and a preparation method thereof, which can be used as an electronic skin to realize tactile perception. Background technique [0002] Electronic skin (e-skin) is one of the most cutting-edge research directions of intelligent materials and sensors, and it is also an emerging field in the development of contemporary electronic information industry. As an important part of electronic skin research, flexible tactile sensors are an important way for robots to perceive external environmental information, second only to vision, and one of the necessary media for robots to directly interact with the external environment or targets. Functional electronic skin has important scientific significance and application value for future intelligent robots to exp...

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Problems solved by technology

[0007] In order to improve the tactile perception sensitivity of the electronic skin, the present invention uses the polyurethane sponge three-dimensional skeleton as a template, adopts a self-assembly method, and prepares a three-dimensional composite conductive material by dipping and wrapping graphene / multi-walled carbon nanotubes / silicone rubber composite conductive materials on the surface of the polyurethane sponge three-dimensional skeleton. Conductive network, and used as a three-dimensional porous microstructure composite medium layer, a high-sensitivity capacitive flexible tactile sensor based on a three-dimensional porous microstructure composite medium layer and its preparation method are proposed, aiming to solve the problem of low sensitivity and stability of existing flexible tactile sensors Poor performance and cumbersome preparation process of the composite dielectric layer microstructure, and provide a feasible design scheme for the tactile perception of electronic skin in different application scenarios by regulating the electrical and mechanical properties of the three-dimensional porous microstructure composite dielectric layer

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